Absolute Zero?

Question

I've heard about Absolute Zero and it sounds really cool. I know what it physically is: 0 K and something like -245 C.

I know some of the things that happen:
Superfluidity, superconductivity, and the air liquefies, is that right. And can someone explain that. I've also heard some rumors about anigravity.

How can the air liquefy? If we ever supposively reached Absolute Zero, would the air completely solidify? I'm looking for an expert.

Thanks!

How can air become a solid, or a liquid? That doesn't make sense. What does it become? Just a giant mass of differant chemicals? Is it clear like air? Or does no one know? And what about liquids defying gravity? Do they float like they're in space? But they can't float? There's no air! Oh, and how does this happen in nature? I mean, I know that it can only get 3K. But that's in deep space. Does that mean, somewhere out there, there's a whole bunch of solid air? And how does it happen in nature? What happens to the particles that makes them all randomly decide to slow down? Why?

Sorry, I ask so many questions. But this is just so interesting!!

How do fluids float? Especially if the air is solid? Why do the laws of physics seem to change with temperature. I mean, why can't we reach Absolute Zero, why can we only get that close? Why can't we just keep slowing the molecules?

Answer 1

I remember being facscinated by absolute zero too, and the coolest thing about is not that air freezes or that substances become superconducting.

You see, states of matter themselves are a function of the temperature in that molecules of solids have lesser energy than do liquids which in turn have lesser wn\\energy than gases. You will notice that the density goes up as the temperature goes down. In effect, at the absolute zero, substances have no internal energy left in them. That is, the molecules do not have the energy to stay at a distance from each other. They collapse!!!
Theoretically this means that sunbstances have infinite density and zero volume! But the collapse of molecules involves collision of electrons with protons and so on... Nobody knows what this means as such a state of matter doesn't occur in nature.

By the way, absolute zero doesn't occur in deep space. Deep space is only colder than, say, earth. You need to realise that temperature is a relative term when you compar e two bodies. It becomes exponentially more difficult to cool objects to lower temperatures ( Think of it this way. It is far easier to cool coffee from 70 celcius to 20 celcius than it is to cool stuff at -20 celcius to -60 celcius even though the temperature drop is still 40 degrees celcius.)

The way I see it, it is infinitely difficult to reach absolute zero: in other words, impossible.

Answer 2

Boy do you have a lot of questions! Curiosity is a good thing!

OK: how can air turn solid? Think of water vapor (steam). You know that if you cool it, it will turn to water, and then eventually to ice. So, you've taken a gas, and turned it into a liquid, then a solid. The same thing happens with oxygen, nitrogen, and all of the other gasses in the atmosphere. If cooled sufficiently, the will all turn first to liquid, then to solid.

As for why we can't actually achieve absolute zero, it's because we simply don't have the technology to remove all of the energy from a substance. Any small amount of residual energy left that can't be removed keeps the temperature from reaching absolute zero. Also, the laws of physics don't change at absolute zero. The observable phenomena are different, but they allow follow the laws of physics.

Answer 3

Absolute zero is 0 Kelvin, or -273.15 Celsius, or -459.67 Fahrenheit. It is impossible to achieve this temperature, because to bring a substance to absolute zero, you must place it in contact with something colder to draw heat away. Since nothing colder than absolute zero exists, this cannot be done. However, we have gotten extremely close (within a millionth of a degree or so).

How can air liquefy? The same way water liquefies. As you remove heat energy from air, the molecules start moving more slowly, allowing the attractive forces between them to become more important. Eventually, the molecules don't have enough energy to escape each other, and they stick together loosely. The substance is now a liquid.

If you continue to remove heat energy, eventually other forces become relevant, and the molecules stick together rigidly. The substance is now a solid.

At absolute zero, everything is a solid.

Answer 4

At absolute zero, all molecular and possibly all sub-atomic motion ceases completely. Basic thermodynamics suggests that this is purely a theoretical state and no matter can actually exist in such a state. as for liquifying air...that depends on chemical mixture of the air I guess. your standard mix of water vaper, oxygen, nitrogen, CO2, O3, CO and other gases that make up your generic "air" would all condense to a liquid state well before reaching absolute zero, and I imagine would also freeze into a solid.

I haven't ever heard anything about antigravity effects being related to Absolute Zero temperatures. but here's a thought...If time slows down as you approach the speed of light, and if in reverse application time speeds up as you slow down...what happens when all movement stops on a molecular level? Absolute Stop=time travel?

Answer 5

If you get them cold enough, most gases will not only liquefy, but freeze. Superconductivity and superfluidity both arise at very cold temperatures; liquid helium (at 4.2 Kelvin) is used to cool the superconducting magnet in MRI machines. You don't get anti-gravity (there is no such thing), but a magnetic field can support a superconducting ring because the magnetic field cannot penetrate it. Absolute zero (0 Kelvin) is equivalent to -273.16 Celsius.

Answer 6

i'm afraid that i'm not precisely particular what you're asserting, yet for my section, at absolute 0, there is not any capability to be limitless. besides the shown fact that, it is likewise achievable that it particularly is impossible to be triumphant in absolute 0. First, the Bose-Einstein condensate varieties at fairly low temperatures and remains that way (to interior our lab-developed thousandths of a level above 0 levels Kelvin), which might recommend that the BEC could carry a definite quantity of capability, no count how chilly it gets, to that end permitting you to under no circumstances attain absolute 0. it is likewise exciting to word that from a physics attitude, the Heisenberg Uncertainty concept woudl recommend which you won't be able to attain absolute 0, because of the fact considering the fact which you won't be able to degree capability and place on a similar time, it may be in action, because of the fact by utilising watching it, you have replaced it. this does not recommend that someone has to truly word some thing and say,"Oops, now i don't know the place it particularly is." it particularly is an theory of atom formation and existence cycle. yet I admit, i'm not a physicist, i'm a geologist. So in step with possibility i'm merely speaking out of my rear.

Answer 7

The temperature energy at abolute zero is equal to =273.15 below zero degree Celcius It is the theoretical temperature where the volume of a gas approaches zero.